Summary:

- This article discusses the history of the shift from traditional fats like butter and lard to processed vegetable oils in the American diet. It explains how this change was driven by the mistaken belief that saturated fats were unhealthy and caused heart disease.

- The article outlines how the vegetable oil industry, led by companies like Procter & Gamble, engaged in a successful marketing campaign to convince the public and medical establishment that their products were healthier alternatives to traditional fats.

- The article argues that this shift away from natural fats has contributed to the rise of chronic health problems like obesity, diabetes, and heart disease, and it calls for a return to the consumption of nutrient-dense traditional fats.